|
标题：磁悬浮飞轮电池系统中悬浮斥力研究 |
|
作者：阚超豪，任泰安，马伯 |
|
| 2015年第10期 访问次数：232次 |
|
摘要：磁悬浮飞轮电池具有功率密度大、充电快、寿命长等特点.而永磁体之间斥力是支撑飞轮悬浮的力源之一，是储能系统实现高效运行的必要条件。本文首先对内、外径分别为70 mm、91 mm，厚度为4 mm的圆环形永磁体建立3D静态场有限元模型，分析了永磁体及周围磁感应强度分布；然后通过三维瞬态场研究其在距离、厚度、内外半径以及介质材料对永磁体之间斥力的影响，并针对改变介质材料使永磁体间的斥力出现不同的原因进行了比较详细的分析；最后通过实验测量，结果与仿真相符。
关键词：飞轮电池；斥力；圆环形永磁体；静态场；瞬态场
Abstract: Magnetic flywheel battery has distinct advantages such as high power density, fast charge, long lifetime and so on. The repulsion force between the permanent magnets, which acts as one of the force sources used for supporting the flywheels, is the necessary condition for the efficient operation of the system. In this paper, finite element analysis method was used for the 3D static field modeling of the ring magnets whose inner diameter, outer diameter and thickness are 70mm, 91mm and 4mm, respectively.The internal and external magnetic flux density of the permanent magnets was analyzed.Moreover, the influential factors of the magnetic flux density, which include magnets′ thickness, inner and outer diameter, external magnetic conductors and the distance between two pieces of magnet, were systematically studied. The impacts of the external magnetic conductors among the factors were mainly researched. Finally, the simulation results were validated by the experiments.
Key words: flywheel battery；repulsive force；circular permanent magnet；static field；transient field
|
|
| |
|
